Blacklists Compared

13 March 2010

Survey results for all known public IP-based DNS blacklists.
Lookups were done on connecting IP addresses.
The "union of most IP zones" line excludes the
hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4),
exemptions.ahbl.org,
query.bondedsender.org,
list.dnswl.org,
accredit.habeas.com,
iadb.isipp.com,
iadb2.isipp.com, and
wl.mailspike.net
zones because they are not blacklists.
Because it is too aggressive to be widely useful the
l2.apews.org zone is also excluded from the union.

Survey results for all known public domain-name-based DNS blacklists.
Lookups were done on the domain names of connecting IP addresses.
The "union of most domain zones" line includes data from the
hostkarma.junkemailfilter.com zone only when the results are
127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

Hits

DNS Zone

192593

(total number of IP addresses whose names were tested, including 172 at SDSC)

Survey results for all known public domain-name-based DNS blacklists.
Lookups were done on SMTP sender domains.
The "union of most domain zones" line includes data from the
hostkarma.junkemailfilter.com zone only when the results are
127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.